grpc/test/core/support/alloc_test.c

/*
 *
 * Copyright 2015 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "test/core/util/test_config.h"

static void *fake_malloc(size_t size) { return (void *)size; }

static void *fake_realloc(void *addr, size_t size) { return (void *)size; }

static void fake_free(void *addr) {
  *((intptr_t *)addr) = (intptr_t)0xdeadd00d;
}

static void test_custom_allocs() {
  const gpr_allocation_functions default_fns = gpr_get_allocation_functions();
  intptr_t addr_to_free = 0;
  char *i;
  gpr_allocation_functions fns = {fake_malloc, NULL, fake_realloc, fake_free};

  gpr_set_allocation_functions(fns);
  GPR_ASSERT((void *)(size_t)0xdeadbeef == gpr_malloc(0xdeadbeef));
  GPR_ASSERT((void *)(size_t)0xcafed00d == gpr_realloc(0, 0xcafed00d));

  gpr_free(&addr_to_free);
  GPR_ASSERT(addr_to_free == (intptr_t)0xdeadd00d);

  /* Restore and check we don't get funky values and that we don't leak */
  gpr_set_allocation_functions(default_fns);
  GPR_ASSERT((void *)sizeof(*i) != (i = gpr_malloc(sizeof(*i))));
  GPR_ASSERT((void *)2 != (i = gpr_realloc(i, 2)));
  gpr_free(i);
}

int main(int argc, char **argv) {
  grpc_test_init(argc, argv);
  test_custom_allocs();
  return 0;
}